d664dba3b79d06c9a4f4b4d835f7778e1103ad2778dae5e3b782411f950fca8f

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
02/05/2024, 01:09

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General

Target

2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe
Size

32KB
MD5

d17a004e8e71293bb1b62009372aec4b
SHA1

a4b729d22023c085731e0e5eeda230c446c911ce
SHA256

d664dba3b79d06c9a4f4b4d835f7778e1103ad2778dae5e3b782411f950fca8f
SHA512

14687c0bc78b72d837410e282354b1068f115a256c920b719411250feef0510169d232a8752ea05b614794c0b4d4dae91d5cb713ccd6f72e5d1a4bf5b8bf594e
SSDEEP

768:bFPm5zusFUB2preAr+Ofjg0S16avdrQFiLjJvtXs:bFPmpiif/oc+vXs

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3076-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b47-13.dat	CryptoLocker_rule2
behavioral2/memory/4156-19-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3076-18-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4156-28-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3076-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x000c000000023b47-13.dat	UPX
behavioral2/memory/4156-19-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/3076-18-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/4156-28-0x0000000008000000-0x000000000800E000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4156	lossy.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3076-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x000c000000023b47-13.dat	upx
behavioral2/memory/4156-19-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/3076-18-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/4156-28-0x0000000008000000-0x000000000800E000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3076 wrote to memory of 4156	3076	2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe	85
PID 3076 wrote to memory of 4156	3076	2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe	85
PID 3076 wrote to memory of 4156	3076	2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3076
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:4156

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\lossy.exe

Filesize
33KB

MD5
5ce73566a6771a62aed67f981e73b0ab

SHA1
4b1b82ecd1446068f75cb2860ab042f6efc511df

SHA256
c5aba6c3bdd4ab8922cc9a0bea075e45a062bfb14d289285ff0555d3518dfdfb

SHA512
145d92ebbf3e60f8015cc24ece58aaa4b0f06e687398b1d880599ab253f13542a9cb5d1561a0aeb67da7a0442ec1d29358a8c08c6148bf98cfeeb619a2c46a9f

Download Submit
memory/3076-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/3076-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3076-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3076-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3076-18-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4156-19-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4156-21-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/4156-22-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4156-28-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download